Variations of atmospheric nitrous oxide concentration in the northern and western Pacific

K. Ishijima, T. Nakazawa, S. Aoki

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Atmospheric N2O concentration was observed in the Pacific for the period 1991-2006, using commercial container ships sailing between Japan and North America and between Japan and Australia or New Zealand. The N2O concentration showed a secular increase and interannual variations at all sampling locations, but a seasonal cycle was detectable only at northern high latitudes. The annual mean N2O concentration showed little longitudinal variations (within ± 0.3 ppb) in the northern Pacific, but showed a clear north-south gradient of about 0.8 ppb, with higher values in the Northern Hemisphere. The annual mean N2O was also characterized by especially high values at 30°N due to strong local N2O emissions and by a steep latitudinal decrease from the equator to 20°S due to the suppression of interhemispheric exchange of air by the South Pacific Convergence Zone. The N2O growth rate showed an interannual variation with a period of about 3 yr (high-values in 1999 and 2000), with a delayed eastward and poleward phase propagation in the northern and western Pacific, respectively. The interannual variations of the N2O growth rate and soil water showed a good correlation, suggesting that the N2O emission from soils have an important causative role in the atmospheric N2O variation.

本文言語English
ページ(範囲)408-415
ページ数8
ジャーナルTellus, Series B: Chemical and Physical Meteorology
61 B
2
DOI
出版ステータスPublished - 2009
外部発表はい

ASJC Scopus subject areas

  • 大気科学

フィンガープリント

「Variations of atmospheric nitrous oxide concentration in the northern and western Pacific」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル